This is a note to let you know that I've just added the patch titled
scripts/gdb/linux/tasks.py: fix get_thread_info
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: scripts-gdb-linux-tasks.py-fix-get_thread_info.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 883d50f56d263f70fd73c0d96b09eb36c34e9305 Mon Sep 17 00:00:00 2001
From: Xi Kangjie imxikangjie@gmail.com Date: Thu, 18 Jan 2018 16:34:00 -0800 Subject: scripts/gdb/linux/tasks.py: fix get_thread_info
From: Xi Kangjie imxikangjie@gmail.com
commit 883d50f56d263f70fd73c0d96b09eb36c34e9305 upstream.
Since kernel 4.9, the thread_info has been moved into task_struct, no longer locates at the bottom of kernel stack.
See commits c65eacbe290b ("sched/core: Allow putting thread_info into task_struct") and 15f4eae70d36 ("x86: Move thread_info into task_struct").
Before fix: (gdb) set $current = $lx_current() (gdb) p $lx_thread_info($current) $1 = {flags = 1470918301} (gdb) p $current.thread_info $2 = {flags = 2147483648}
After fix: (gdb) p $lx_thread_info($current) $1 = {flags = 2147483648} (gdb) p $current.thread_info $2 = {flags = 2147483648}
Link: http://lkml.kernel.org/r/20180118210159.17223-1-imxikangjie@gmail.com Fixes: 15f4eae70d36 ("x86: Move thread_info into task_struct") Signed-off-by: Xi Kangjie imxikangjie@gmail.com Acked-by: Jan Kiszka jan.kiszka@siemens.com Acked-by: Kieran Bingham kbingham@kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- scripts/gdb/linux/tasks.py | 2 ++ 1 file changed, 2 insertions(+)
--- a/scripts/gdb/linux/tasks.py +++ b/scripts/gdb/linux/tasks.py @@ -96,6 +96,8 @@ def get_thread_info(task): thread_info_addr = task.address + ia64_task_size thread_info = thread_info_addr.cast(thread_info_ptr_type) else: + if task.type.fields()[0].type == thread_info_type.get_type(): + return task['thread_info'] thread_info = task['stack'].cast(thread_info_ptr_type) return thread_info.dereference()
Patches currently in stable-queue which might be from imxikangjie@gmail.com are
queue-4.9/scripts-gdb-linux-tasks.py-fix-get_thread_info.patch